bids are invited for lightening arrestor or surge arresters with insulating base - lightening arrestor or surge arresters with insulating base, surge monitor (discharge counter) 1-ph, 198kv,discharge class 10ka, heavy duty gapless zno type, solidly earthed, short circuit current at arrester location:40 ka, maximum duration of earth fault: 1 second, impulse withstand voltage value of equipment to be protected: 1050 kv, rated frequency: 50 hz, designed as per relevant standards, maximum continuous operating voltage: 168 kv, rated arrester voltage: 198 kv, maximum system voltage-245 kv, nominal discharge current: 10 ka, pressure relief class ((short circuit capability):class-a, long duration discharge class: class-iv, material of housing: composite insulator, (polymer insulated, silicon rubber insulation), 3 stack position, nominal creepage distance: 31mm/kv per mm, withstand test voltages: a)one minute power frequency: 460, b)lightning impulse1050 kv, make : oblum/siemens/elpro/abb/cglspares to be supplied: complete set of gaskets: 01 no., discharge counter: 01 no, leakage current meter: 01 no., earth disconnector : 01 no., insulating base: 01 no., insulated connecting lead between arrester and discharge; counter: 01 no.tests: a)type tests: type test certificate to be produced. b)acceptance tests: as per relevant standard, no of units to be subjected to acceptance tests: as per relevant standard, all type & routine test certificates are required before placing p. o., guarantee( minimum 18 months from the date of installation) total quantity : 1